Added unit-test for orientation restraints output.

Added unit-test for orientation restraints output.

In order to allow splitting of the gmx energy functionality
into an NMR and an energy part additional tests are needed.
The regression test tests the content of the edr file but
not the extraction to xvg files, which is what this test
contributes.

The test is complicated by intricate differences between single-
and double precision files, which was cleaned up.

Had to add memory cleanups in multiple locations as well, e.g.
for cleaning cmap data structures. Never touch untouched code.
Change-Id: I0a6ee05f38bd198c9a3c37f7f837a28ce77b74e0